Calendar clock



July 3, 1925. 1,675,761 MARTNI GALENDAR CLOCK Sheets-Sheet l July 3, i928. 1,675,761

MARTINI CALENDAR CLOCK Filed Jan. 1926 4 Sheets-Sheet 2 jggz lNVE/VTOR July 3, 1928.

M. MARTINI CALENDAR CLOCK Filed W n. 2, 1926 4 Sheets-Sheet 3 July 3, 19zs. 1,675,761

M. MARTINI CALENDAR CLOCK Filed Jan. 1926 4 Sheets-Sheet 4 Patented Jul 3, 1928.

UNITED- STATES PA-TENT OFFICE.

MARCO MARTINI, 0F OAKMON'I, PENNSYLVANIA.

CALENDAR CLOCK.

Application filed January 2, 1926. Serial 1W0. 78,789.

tion of which is intermittently governed by a.

spring-motor of thetype usually found in or.- dinary time-clocks. Another object is the provision of such a calendar device in which the changes of dates are performed instantly at or about midnight. A further object is to provide in such a calendar clock means whereby the used up portion of the date bearin ribbon is led out of the casing, said means liaving suitable provisions for tearing of! the used up portion of said ribbon. Additional features and advantages may appear from the following description considered in connection with the accompanying drawings forming a partof this application, and in which:

Fig. 1 is a front elevation of the operating mechanism and supporting frame-work of my invention, in which view the face of the calendar-clock has been removed for the sake of clearness.

Fig. 2 is a side elevation of the operating mechanism and supporting frame, the latter being shown in section.

Fig. 3 is an enlarged fractional front elevation showing my preferred method-of periodically shifting the hour and the minutedials of the clock.

Fig. 4 is a side view of the hour dial.

Fig. 5 is a side view of the minute dial.

1 Fig. 6 is a front elevation of a finished calendar-clock built according to my invention, said view also illustrating the relative positions of the calendar-date and time-figures. Fig. 7 is a diagrammatic perspective view shown the method of intermittently operating t e hour and the minutedials, as well as the calendar by means of a systemof cams and levers to be described later.

Fig. 8 shows in perspective a special es- "capement mechanism used for operating. the

endar rolls and ribbon once every twenty four hours for the purpose of changing the date on the calendar-clock.

Fig. 9 is an enlarged view of a detent, or dog, shown in Fig. 8.

- Fig' 10 shows in perspective the method of guidin the unwound calendar-ribbon in a guide-s eath. i

Y Reference being had to the drawings, the calendar-clock mechanism comprises a slightly modified standard, long running, time-clock mechanism indicated generally by the letter T, which mechanism is suitably mounted on the back wall 1 of the clock casing 2. The modification in said mechanism consists in suitably lengthening towards the front of the calendar-clock of the hour-shaft 3, the second -shaft 4 and the windingstem 5. At the end of the hour-shaft there is suitabl secured the hour 0 crating cam 6 and ana ogously mounted on t e second shaft is the minute 0 rating cam 7 said cams run clockwise andire used respectivel to operate the hour dial and the minute. dia 'YIRefei-ring especially to Figs. 3 and 7, the hour dial 8 is rotated in the counter-clock sense indicated by the arrow'9 by means of the following mechanism: A pin 10, adapted to ride over the contour of the cam 6, is secured on a substantially horizontal lever 11, fulcrumed at 12 on the vertical post 13 and guided for vertical rocking movement by the slide 14 provided at the top of another vertical post 15, said posts being secured'by means of screws 16 on the cross-brace 17 of the frame-work. At the free end of the lever 11 is rockably secured by means of a in connection 18 the substantiall vertical link 19 to which is also hin ly connected through the pin connection 20 the short horizontal bar 21Jthe other end of which is rockabl supported by the shaft 22 of the hour-dia 8. 'Upon said bar. I

is pivotally mounted the weighted pawl 23 the tip ofwhich is ada ted to enga anyone of the twenty four teet of the rate et-wheel Y 24 which is securely mounted on the'shaft 22 and to which is riveted the hour-dial 8. The

latter is preferably made as light as possible by using very thinmateriai and cutting a l superfluous material. On'the front 0 dial there are .two grou s of figures 25 and out s d. 100.

26 running consecutive y from 1 to 12 to indicate res ctively the hours of day and night. To ifierentiate these hours, the ones corres I on a b ack nd'ng to night time may be marked back-ground, as shown in Fi 3'. The rotation in a counterclock sense 0 the:

hour dial is effected as follows: The con stantly running hour-shaft 3. with the i 6 making one full turn every hour gradually and'slowly raise-the pin 10 and the various connected elements until the time whensaid infreaches the highest oint of the cam. pon further rotation the cam, the pin is caused by the weightof the mechanism proper to drop suddenly from the hi hest point to the lowest oint of the cam. his drop is transmitted y the various elements to the pawl '23 which then compels the ratchet-wheel to advance by one tooth, i. e. one twenty fourth of a revolution, which amount, ofcourse, changes the reading of the dial from one hour to the next following one. If found necessary, and deficiency in I the required weight of the lever system to push thedial forward, may be corrected by means of suitable springs, or preferably, by applying a specified weight 27 to the lever 11 The counterclock wise operation of the minute-dial 28 is (performed through the agency of a cam an lever system similar in construction to the one just described. A

' and topo as much as 1 pin 29-rides on the cam 7 and is secured to 'the lever 30 fulcrumed at 31 on the post 15 ided in a slide 32 placed on the post 13. e operating pawl 33 is .o erated in the obvious manner by the hig edly connected link 34-and the bar 35, the former 'beingguided' in a sleeve 36 positioned on the the post 13 and the latter resting. freely on the shaft 37 of the minute dial. The operating pawl is also of the weighted type and is adaptedto engage the teeth 38 of which there are sixty on the ratchetwheel 39 to which the dial 28 is secured by means of rivets 40. Owing to the very moderate amount of power which may be derived from the second -shaft 4,, it becomes still more imperative to reduce the weight of the relativel large minute-dial to a minimum and for t treason it' is made of very light gaugematerial. and cut out 'ble,'"as suggested in Fig. 3. The cam makesa ful turn every sixty seconds, each turn causes the pawl 33 to shift the ratchet-wheel 39 forward one tooth j thereby changing the reading of the minute dicating figures 41 to the next-following.

Ummute."

A'Io revent'the an as and the minute 'flial 2n rotating more than the required suggested the ammatically in Fig. 7.

All the inormation' pertainingv to the.

due to the momentum .imp'artedto them byjtheir respective-pawls'z23 and 33, said dials are preferably subjected to the brakingaetion of the "light springs 42 and 43 which bear upon the teeth of their respective ratchet wheels 24 and 39, and which are daily. calendar isfirinted' on' a strip o ribbon 44, preferably 0 paper,--which is wound upon a reel 45 rotatively supported by the two parallel arms 46 1ocated at the top of the main frame 47. This ribbon "is guidedto travel for a' certain distance close and parallel to the inner side of the front 48 by the guide-rollers 49 and 50, and then passes between the traction roller 51 and the friction roller 52, the pressure of which on the traction roller is adjustable by any suitable means, such as the screws 53. The ribbon is then guided outside of the casin b the sheath 54 which extends through t 1e b ackwall 1 of the casing and which is provided with a cutting edge 55 whereon the used up portion of the ribbon may be torn off.

The diameter of the traction roller 51,which effects the requireddaily unwinding on the ribbon, is such that it will unwind an amount of ribbon equal to the length of the portion corresponding to each day. The power required to move the calendar-ribbon once a day, preferably at or about midnight, is derived from a separate spring-motor 56 whose construction is described later and which transmits its energy to the traction roller 51 by means of a train of suitably proportioned gears represented by the numerals 58, 59, 60 and 61, the latter being secured on the shaft 62 of the traction roller. The speed of rotation of this train is adequately reduced by'means of a vane 63 clamped on a shaft 64 rotated by the gears 65 and 66. The winding of the spring-motor 56 is erformed from the front of the calendar-c ,ock by means of an ordinary sock'et key applied to a shaft 67 suitably journaled in a support 68 and connected by a set of bevel gears 69 to the winding stem 70 of said spring.

Many types of spring-motors are now available in the market forjoperating the calendar-ribbon; The spring-motor shown in Fig. 1 comprises a stationary springhousing 95 mounted on the main frame and closed by means of the large gear 58 which is freely mounted onthe winding-stem7 upon which is secured in any desired manner the ratchet-wheel 57. The power-spring 96 has one of its ends riveted to the housing and the "other end'fastened to the windingstem 70, and rotation is communicated fromthe ratchet-wheel 57 to the large gear 58 by means of a mounted on sai gear.

As stated before, the power of the latter" mounted on the post and carries intermediate said sleeves the hingedly mounted 'detent, or dog, 76 which, as shown particularly in Fi 8 stopped in its upward swing by a pin 7 driven in the rod 72. This dog has a weight 78 the tendency of which is-to awl 97 which is pivotally hold the former substantially against the stop-pin 77.

Hingedly mounted upon a bearin bracket 79 fastened to the post 7 5 is a'be l-cranklever 80 having on its upper arm a nose 81 which is adapted to engage the pin 82 provided in the gear 65. The horizontal arm of said lever is subjected constantly to .the action of a compression sprin 83 which tends to rotate this lever in a cloc wise sense, which motion is limited by the U-shaped stop 84.

It will be noted that, as the cam 71 makes its single rotation every day, it will gradually lift the rod 72 and allow the dog 76 to pass by and above the horizontal arm of the bell-crank-lever 80. At about midnight, the rod drops by its own weight from the highest point on the cam 71 to its lowest point; this causes the dog to strike the bellcrank-lever and rotate it counterclock wise thus releasing the pin 82 and enabling the gear 65, and the traction roll 51, to rotate a full turn, that is, until the pin 82 is again halted by the nose 81 of the bell-crank-lever which by this time has been returned into normal position by the spring 83. The calendar-ribbon is thus moved forward to show another date. This process is, of course, repeated for every day of the year or as long as the calendar-ribbon will last.

In the front of the calendar-clock are, of course, rovided the' jsuitably dirziensioned and isposed' apertures whereby the time and calendar indications may be read Thus, by 'referrin to Fi 6, it wiil be readily understoo that t e openings 85, 86 and 87 show respectively the dates, hours and minutes, whereas the openings 88 and 89 are provided for winding the time clock and the calendar-springs respectively.

The seconds are indicated in this present embodiment of my invention inthe usual manner by means of the stationary dial 90 and the hand 91. In order to enable the removal of the front of the. clock without having to pull out the, second-hand, I prefer to place the second-dial on asuitably bent plate 92 secured by rivets 93 to the post 15 (see .Fig. 3), said dial being located behind and close to the front 48 and visible through an aperture 94 out in the front.

As will be understood, as suggested herein, there may be slight changes made in the construction and arrangement of the details of my invention without departing from the field andscope of the same, and 1 intend to include in this application all such variations, as fall within the scope of the appended claims. I

I claim I 1. In a device for intermittently moving a ribbon, such as the calendar-strip of a clock, the combination of a spring-motor; a moving means for said ribbon; a train of gears inton posed between said spring-motor and said moving means, and an escapement mechanism adapted for intermittently operating said moving means by said spring-motor; said escapement mechanism comprising a pin connected to and rotated by said moving means; a bell-crank-lever normally in locking engagement with said pin; a vertical slidable rod; a dog rockably mounted thereon in such a manner as to break the engagement between said bell-crank-lever and pin on the downward movement of said'rod, and means for lifting said rod and subsequently causing the sudden drop thereof.

2. In a device for intermittently moving a ribbon, such as the calendar-strip of a clock,

the combination of a spring-motor; a movie's means for said ribbon; a train of gears posed between said spring-motor an moving means, and an escapement nism adapted for intermittently operating said moving means by said spring-motor;

said esca ement mechanism comprising a pin connected to and'rotated by said moving means; a bell-crank-lever; resilient means normally holding said lever into lockin e11 gagement with said pin; a vertical slioabie rod; a dog rockably'mounted thereon in such a manner as to break the engagement between said bell-crank-lever and pin on the downward movement or" said rod, and means for lifting said rod and subsequently casein sudden drop thereoin evice for ermittently mo s L a, 2. .5. ribbon, secs the caiendar stri woi a moon,

the combination at a spring motor, a mov ing means for said ribbon; a train of gears interposed between said 'springmotor and said moving means,and an escapementmechm nism adapted for intermittently operating said moving means by said spring-motor; said escapement mechanism comprising a pin connected to and rotated by said moving means; a bell-crankleyer; resilient means for normally holding said iererinto locking engagement with said pin means to limit the amount of rotation of the beil-crank-lever toward said pin; a vertical slidable rod; 2. dog rocirabl thereon in each a manner as to break between said bell-cranlt-lever and pin on the downward movement of said rod, and means for lifting said rod and subsequently causing the sudden drop thereof. I

a. In a 183 1666073 intermittently moving a ribbon, such as the calendarstrip of a clock,

the combination of a springmotor; a mov ing means i r said ribbon; a train. oi gears interposed between said spring-motor and said moving means, and an escapement mechanism adapted for intermittently operating said moving means by said spring-motor; said escapeinent mechanism comprising apin connected to and rotated "by said moving means; a bell-crank-lever; resilient means for normally holding said lever into looking engagement with said pin; means to limit the amount of rotation of the hell- 5 crank-lever toward said pin; a vertical slidable rod; a dog roekably mounted thereon in such a manner as to break the engagement between said bell-erank-lever and pin on the downward movement of said rod; means to limit the upward rocking movement of said 10 dog on said rod, and means for lifting the rod and subsequently causing the sudden drop thereof. In testimony whereof I affix my signature.

MARCO MARTINI. 

